Fan.



w. SPARKS;

FAN.

APPLICATION FILED SEPT. 11. l9l4.

Patented Apr. 27, 1915.

To H M: Y.

sea.

,LEIS, 8F JAQKSGH, MICHEGAH.

mes nee.

To all whom it may concern Be it known that I VVILmaa-l', Seam-2 citizenof the United otates, and. resident Jackson, in the county of Jackson,the State of Michigan,

have invented lit. and

useful Improvements in Fans, of xvh'ch the following, taken inconneclion vii companying drawings, is a full, I. exact description.

This invention relates to certain improvements in rotary fans adapted tocreate :2 circulation or moving current of fluid such as air. l

The primary object of the invention: is ie produce a rellztively strongli ht, and ellicient fan at a minimum expense and sherehy improve and.cheapen the product.

Special objects and. ad antages (rill appear from the followingdescription when in connection. with the accompanying draw ings inwhich- Figure 1 is a front elevation of afan made in accordance withthis invenion. Fig. 2 L

a side elevation 01" same. 3 cross SGCljlOIl on hue 33 l 1?. Ii. Fig 15a View of one of the bladeforr" members. Fig. 5 is a view of thecoacting lilade-for'ar iug member. Fig. 8 is a front elevation partlybroken away illustrating the manner of forming fans with Vfill'lHllSnumbers of blades.

The fan shown in 1 comprises a pa of crossed-plate light members, 1 2::V sheet m tal or similar material central tact with ch other, and pr.stantially c1rcular in shape, altbou many and various forms may he used.ll o posite end portions of the plates, 1 and 52, a adapted to formblades, and 6, and 7 and Y 8, respecti rely.

out to form a substantially circular opening The section, 3, of theplate, 1, is pressed having a laterally extending flange lei around itsedge adapted to form a hub the fan and the central. portion of theplate,

i, is likewise pressed out to form an open-- Widen as they "ans, 3 andrespcctivelyii l con Serial No. 861,221.

form and. telescope one Within the other and the contacting parts, 3 and4, or the flanges, 9 and 10, respectively or both may be connected toeach other in any suitable manner as by weldin or soldering, etc.

Each of the blades, 5, 6, 7, and 8, are preferably notched or groovedupon their opposite edges at substantially the points Where thy meet thecentral sections, 3 and 4, respectively for the purpose of facilitatgthe deflecting of the blades as hereinalter described, and these bladespreferably extend outwardly from the central sections and are preferablyeach provided with a pair of reinforcing ribs, 11 and .12, respectively,gradually diverging as they exizend outwardly from the sections, 3 and4-, espectively and formed by pressing up portions of the blades and ofthe central sections, 3 and. 4, and the central section, 3, eferablyprovided with opposite pairs d grooves or channels,

" for interlocking engagement with the ribs, 11 and. 12, respectivelyides, 7, and 8. l5-- of each of the blades 5, is deflected laterally tothe same united central sections 3 and 4, angle to produce the maximumiency in fluid movement and of the blades 7 and 8 is dein the oppositedirection, a ti lly equal to the thickness Wom n 3 so that these edgeslie in suhsta Emily the same plane as A I d edges of the blades 5 and 6,cling from the central section 3. 1'; will. be apparent that, with theform of nvent on here illustrated in which the f upon one side of thecentral sections, 3 and 4, that preferably the blades are entirely tothe same side of plane o l-the central section; nevertheless, do notlimit myself so that construction as the blades may be. deflected toeither side of the plane of the central sections, 3 and i, to extendupon both sides of that plane with any relative arrangementwithoutall'ecting the operativeness of-the invension, 0r departing fromthe spirit of the same as forth in the appended claims. To Fig. 6, I!have illustrated a fan of six onstructcd in accordance with this an, layutilizing three crossed or inlates, each plate constituting the fan andhaving hubs nestracemes a es, 21915.

13 and 14, re-

ed or telescoped in the same manner as illustrated in the former figuresand it, should be understood that fans of this. invention may beconstructed with any number blades desired, which number may be odd oreven, without departing from the spirit of this invention as also set'forth in the appended claims.

What I claim is: I k 1. A fan comprising separate blade formvided withinterengaging ribs and grooves,

and telescoping portions extending substan tially perpendicular to saidcontacting portions.

2. A fan comprising separate blade forming members having portions incontact with each other in substantially the plane of rotation of thefan, and portions disposed at substantially right angles to the plane ofrotation of the fan and coacting to form a hu 3. A fan comprisingseparate blade-formin g members having portions in contact with eachother and telescoping portions extendmg substantially perpendicular tosaid contacting portions.

ill telescoping, hubs.

4. A fan comprising separate blade-formin members having portions incontact, and to escoping cylindrical portions'having their axes at rightangles to the planes of the contacting ortionsz 5. A an composed ofcross plateshaving telesco ing portions coactin to form a hub, said ateshaving their en s deflected substantially, wholly .to that side of theplane of one end of. the'hub upon which the hub mg members havingportions in contact pro is" located. v v

1 6.,A fan com"psed oi crossed-plates hav- A fan composed ofcrossed-plates, each plate provided flange, one of said laterallyextending flanges telescoping within the other.

8. A fan composed of separate plates lying in intersecting lanes, eachplate having a hub, said hubs te escoped.

In witness whereof I have hereunto set my hand this 31st day of August,1914.

WILLIAM SPARKS.

Witnesses:

Lnmmn WUNDEBLIGH, W. B. PATCH.

with a laterally extending

